We cook mostly outside all the time. It keeps smells and grease out of the camper. We use our camper oven a lot though. Yes, it adds heat. Open fire cooking is messy with black soot over everything, foil wraps over a fire sometimes burn the contents since you can't see what's going on, Gas or charcoal grills are messy and have to be cleaned well or they make everything they touch in storage dirty too. That's why electric griddles outside work so well for us, and boiling water, creating steam works well outside on the Coleman camp stove.